Come for the boats, stay to explore the intriguing assortment of art.

The abandoned remains of this once-thriving hotel looms over the city, awaiting an uncertain future.

This beachside town is home to a diverse nature reserve, multiple cays, and one of the three bioluminescent bays in Puerto Rico.

This Costa Rican chapel is the most metal church in the world, literally.

This abandoned hospital is one of the most haunted places in Costa Rica.

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.

This Costa Rican topiary park is a surreal garden of unearthly delights.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

The crumbling remains of a once-grand building.

A crumbling cathedral condemned by an earthquake.

These relics of the city's past now exist as a prominent modern feature.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Budapest's Communist-era statues, banished to the suburbs.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

An angular maze of concrete in Grand Rapids acts both as public art and as a staircase for fish traveling upstream.

At HopCat, a marker honors fictional creatures with the ability to travel the missing dimensions of Kcymaerxthaere.

Religion and personal struggle gave birth to this collection of concrete angels.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

A forgotten sea village stands silent after hurricanes deemed it obsolete.

This century-old roadside attraction is full of bizarre rock formations.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

An extravagant western hotel where every floor is the "ground floor."